PROTHENA CORP PLC's ticker is PRTA and the CUSIP is G72800108. A total of 189 filers reported holding PROTHENA CORP PLC in Q1 2023. The put-call ratio across all filers is 0.56 and the average weighting 0.4%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2023 | $1,954,515 | +62.2% | 28,625 | +43.1% | 0.00% | +100.0% |
| Q4 2022 | $1,205,000 | +285.0% | 20,000 | +354.5% | 0.00% | – |
| Q3 2021 | $313,000 | -72.3% | 4,400 | -96.1% | 0.00% | -100.0% |
| Q3 2020 | $1,128,000 | +112700.0% | 112,965 | +111746.5% | 0.00% | – |
| Q4 2018 | $1,000 | -98.9% | 101 | -98.6% | 0.00% | – |
| Q3 2018 | $94,000 | -81.5% | 7,200 | -79.4% | 0.00% | -100.0% |
| Q2 2018 | $509,000 | -82.9% | 34,940 | -57.0% | 0.00% | -75.0% |
| Q1 2018 | $2,982,000 | +1243.2% | 81,233 | +1271.7% | 0.00% | – |
| Q4 2017 | $222,000 | – | 5,922 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $558,941,510 | 18.85% |
| Finepoint Capital LP | 349,300 | $16,853,725 | 8.39% |
| Palo Alto Investors LP | 1,657,458 | $79,972,349 | 7.57% |
| Birchview Capital, LP | 169,574 | $8,181,946 | 6.96% |
| First Light Asset Management, LLC | 1,494,039 | $72,087,382 | 6.85% |
| DCF Advisers, LLC | 82,950 | $4,002,338 | 2.18% |
| Prosight Management, LP | 126,202 | $6,089,247 | 1.93% |
| PFM Health Sciences, LP | 836,571 | $40,364,551 | 1.90% |
| SECTORAL ASSET MANAGEMENT INC | 172,407 | $8,318,638 | 1.62% |
| Boxer Capital, LLC | 625,000 | $30,156,250 | 1.60% |